3VUY

Crystal structure of A20 ZF7 in complex with linear tetraubiquitin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.218 

wwPDB Validation   3D Report Full Report


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Literature

Specific recognition of linear polyubiquitin by A20 zinc finger 7 is involved in NF-kappaB regulation

Tokunaga, F.Nishimasu, H.Ishitani, R.Goto, E.Noguchi, T.Mio, K.Kamei, K.Ma, A.Iwai, K.Nureki, O.

(2012) EMBO J 31: 3856-3870

  • DOI: 10.1038/emboj.2012.241
  • Primary Citation of Related Structures:  
    3VUW, 3VUX, 3VUY

  • PubMed Abstract: 
  • LUBAC (linear ubiquitin chain assembly complex) activates the canonical NF-κB pathway through linear polyubiquitination of NEMO (NF-κB essential modulator, also known as IKKγ) and RIP1. However, the regulatory mechanism of LUBAC-mediated NF-κB activation remains elusive ...

    LUBAC (linear ubiquitin chain assembly complex) activates the canonical NF-κB pathway through linear polyubiquitination of NEMO (NF-κB essential modulator, also known as IKKγ) and RIP1. However, the regulatory mechanism of LUBAC-mediated NF-κB activation remains elusive. Here, we show that A20 suppresses LUBAC-mediated NF-κB activation by binding linear polyubiquitin via the C-terminal seventh zinc finger (ZF7), whereas CYLD suppresses it through deubiquitinase (DUB) activity. We determined the crystal structures of A20 ZF7 in complex with linear diubiquitin at 1.70-1.98 Å resolutions. The crystal structures revealed that A20 ZF7 simultaneously recognizes the Met1-linked proximal and distal ubiquitins, and that genetic mutations associated with B cell lymphomas map to the ubiquitin-binding sites. Our functional analysis indicated that the binding of A20 ZF7 to linear polyubiquitin contributes to the recruitment of A20 into a TNF receptor (TNFR) signalling complex containing LUBAC and IκB kinase (IKK), which results in NF-κB suppression. These findings provide new insight into the regulation of immune and inflammatory responses.


    Organizational Affiliation

    Laboratory of Molecular Cell Biology, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma, Japan. ftokunaga@gunma-u.ac.jp



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Polyubiquitin-CA, E [auth B], C76Homo sapiensMutation(s): 0 
Gene Names: UBC
UniProt & NIH Common Fund Data Resources
Find proteins for P0CG48 (Homo sapiens)
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PHAROS:  P0CG48
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Tumor necrosis factor alpha-induced protein 3B [auth D], F [auth E], D [auth F]35Homo sapiensMutation(s): 0 
Gene Names: TNFAIP3OTUD7C
EC: 2.3.2 (UniProt), 3.4.19.12 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P21580 (Homo sapiens)
Explore P21580 
Go to UniProtKB:  P21580
PHAROS:  P21580
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.218 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.438α = 90
b = 62.438β = 90
c = 85.355γ = 120
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
BSSdata collection
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-02-13
    Type: Initial release